Symptom
- iostat show better throughput on Non-NVME vs. NVME while inserting
Non-NVME
Device tps kB_read/s kB_wrtn/s kB_dscd/s kB_read kB_wrtn kB_dscd
dm-0 2600.80 3.20 20173.90 0.00 16 100869 0
sda 2600.40 3.20 20173.90 0.00 16 100869 0
sdb 16.00 0.00 177.60 0.00 0 888 0
sdc 0.00 0.00 0.00 0.00 0 0 0
avg-cpu: %user %nice %system %iowait %steal %idle
5.49 0.00 17.46 0.00 0.00 77.05
NVME
Device tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sda 0.00 0.00 0.00 0 0
nvme0n1 3079.40 6.00 6183.60 30 30918
dm-0 3082.60 6.00 6184.00 30 30920
dm-1 0.00 0.00 0.00 0 0
dm-2 0.00 0.00 0.00 0 0
avg-cpu: %user %nice %system %iowait %steal %idle
0.10 0.00 0.06 0.69 0.00 99.15
- O_SYNC/O_DIRECT shows worse I/O performance on Non-Volatile Memory Express (NVME) then spinning disks
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Environment
SAP Adaptive Server Enterprise (ASE) 16.0
Product
Keywords
CR 830776, 830776, NVME, io, through put, performance, volatile , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Product Enhancement
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